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Port Adelaide, Australia

Burnell R.,Australian Water Environments | Bekesi G.,Australian Water Environments | Telfer A.,Australian Water Environments | Forward P.,SA Water | Porter B.,Water and Natural Resources
Australian Journal of Water Resources | Year: 2013

In addition to the threat posed by high salinity to drinking water, increased salinity in the River Murray also represents a threat to the health of floodplains, wetlands and may increase the costs of infrastructure maintenance. In the Lower Murray Basin most of the salts in the river originate from groundwater. Run of river salinity surveys are used to measure salt inflow. They measure electrical conductivity every kilometre over five consecutive days, at low and steady river flows. For a robust interpretation of salt inflow, the background electrical conductivity has to be removed from the measurements. The existing methodology is robust for analysing cumulative salt inflows over river reaches but assigns salt inflows up to several kilometres downstream from where they actually occur. A new method has therefore been developed to assign the salt inflow more closely to the location where it actually occurs and at the correct rate. The new methodology is based on the assumptions that salt inflow is the function of space only (during the survey) and the background conductivity can be described by the temporal variations observed at a fixed location. These in turn allow better targeting of the high salt inflow zones for salt interception. © Institution of Engineers Australia, 2013. Source

Majewski P.,University of South Australia | Luong J.,SA Water | Stretton K.,Scaled Management Systems Pty Ltd.
Water Science and Technology | Year: 2012

The removal of sucrose and fructose from water at various high concentrations by surface engineered silica (SES) was studied using dissolved sugar in pure water. The results indicate that sugar at concentrations of up to 800 g/L can be removed by SES at a relatively high dose of 250 to 300 g/L. Based on these results, process water from a soft drink filling station which was contaminated by sugar, flavour components, Escherichia coli, Pseudomonas aeruginosa bacteria and Candida pelliculosa yeast were treated to study the performance of SES using actual process water samples by analysing turbidity, biological oxygen demand (BOD), UV absorption, and various other standard parameters, and microbial tests. The study shows that at a dose of 100 g/L of SES bacterial contamination as well as turbidity, BOD and UV absorption can be significantly reduced. However, the study found the yeast species Candida pelliculosa could not be removed from the water samples. © IWA Publishing 2012. Source

Wong A.,University of Adelaide | Vince P.,SA Water | Gamboa E.,University of Adelaide
Annual Conference of the Australasian Corrosion Association 2012 | Year: 2012

Pumping is one of the major costs in many industries that require liquid transportation. By improving pump efficiency, significant energy and cost savings can be achieved. One of the methods that are used to improve pumping efficiency is to apply an anticorrosion coating to the pump internal surfaces. The coatings trialled in this project are two ceramic filled epoxies from two different suppliers, and an epoxy from a third supplier. These were trialled on two pumps and pump efficiencies were measured over a ten year period. Results are presented and compared. It was found that ceramic filled epoxies achieved the best performance in these examples. It was also found that regular pump testing is an ideal method to evaluate pump performance and can be used to schedule major overhauls. Copyright © (2012) by the Australasian Corrosion Association. Source

Marchi A.,University of Adelaide | Dandy G.,University of Adelaide | Wilkins A.,SA Water | Rohrlach H.,Tonkin Consulting
Journal of Water Resources Planning and Management | Year: 2014

In recent years, a number of evolutionary algorithms have been proposed for optimizing the design and operation of water distribution systems (WDSs). These evolutionary algorithms include genetic algorithms, ant colony optimization, particle swarm optimization, the shuffled leaping frog algorithm, and differential evolution. Although there have been some comparisons made of the performance of the various algorithms, very few of these comparisons have been carried out in a completely rigorous manner. The main aim of this paper is to introduce a methodology for the rigorous comparison of various algorithms for the optimum design of water distribution systems. The methodology involves comparing the various algorithms in terms of (1) the best solution obtained; (2) the speed of convergence; and (3) the spread and consistency of the solutions obtained over a number of random starting seeds and numbers of evaluations. As a demonstration of the methodology, the techniques of genetic algorithms (GA), particle swarm optimization (PSO), and differential evolution (DE) are applied to two frequently used WDS case studies, namely the New York Tunnels and Hanoi water networks. In addition, the techniques are applied to a real-size water distribution system consisting of 476 pipes. The results obtained show that the algorithm performances depend on the specific problem and the number of function evaluations allowed. Moreover, it is shown that correct calibration is an essential phase for a fair comparison of evolutionary algorithms. In fact, the best parameters are a function of the problem characteristics, of the objective function and of the variants in the algorithm operators. Therefore the adoption of configurations tested on slightly different versions of the algorithms can lead to quite different results. © 2014 American Society of Civil Engineers. Source

Ayala V.,Chrysler Group LLC | Kildea T.,SA Water | Artal J.,Chrysler Group LLC
Desalination and Water Treatment | Year: 2015

Abstract: Desalination has come to the fore in Australia as a means of “water proofing” Australian coastal cities against drought. The construction of large desalination plants along Australia’s coastline has generated considerable public debate, which has required plant operators to provide assurance that the protection of the local environment is a strong core value in the developments. The dispersion of the saline concentrate reject from these plants has been the focus of numerous modelling and monitoring studies, as rapid dilution is required to minimise potential impacts to the local marine environment from high salinity concentrations. The plant is designed to produce potable water at different rates dependent upon the city’s demand at different times of the year. This variable flow creates a challenge as the velocity of the saline discharge being dispersed through the outfall can dramatically change, influencing dilution. The Adelaide Desalination Plant utilises duckbill valves to rapidly disperse the saline concentrate waste stream into the local marine environment. The results to date have shown that this novel engineering solution has increased the dispersion of the saline waste at low flows, protecting the local marine environment from the adverse effects of concentrated salt water. © 2014 Balaban Desalination Publications. All rights reserved. Source

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